

grade=[100,90,87,76,98]
print("原列表",grade)
grade.sort()
print("升 序",grade)
grade.sort(reverse=True)
print("降 序",grade)



char=["Angela","Tom","cat","pet"]
char.sort()
print("区分大小写：",char)
char.sort(key=str.lower)
print("不区分大小写：",char)